<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml"
      xmlns:myns="http://example.com/myns">
<head>
<meta charset="UTF-8" />
<style>
@namespace myns url("http://example.com/myns");
myns|elem-1 { background-color: lime; }
</style>
<style>
@namespace url("http://example.com/myns");
elem-2 { background-color: lime; }
</style>
<style>
@namespace myns url("http://example.com/myns");
myns|elem-3 { background-color: lime; }
</style>
<style>
@namespace url("http://example.com/myns");
elem-4 { background-color: lime; }
</style>
<style>
@namespace myns url("http://example.com/myns");
myns|elem-nonexist-1 { background-color: lime; }
</style>
<style>
@namespace url("http://example.com/myns");
elem-nonexist-2 { background-color: lime; }
</style>
</head>
<body>
<blockquote>
<myns:elem-1>myns:elem-1</myns:elem-1>
</blockquote>
<blockquote>
<myns:elem-2>myns:elem-2</myns:elem-2>
</blockquote>
<blockquote>
<elem-3 xmlns="http://example.com/myns">elem-3</elem-3>
</blockquote>
<blockquote>
<elem-4 xmlns="http://example.com/myns">elem-4</elem-4>
</blockquote>
</body>
</html>
